Just re watched it Dale definitely rolls the start. Evil tribe is gonna claim false start! Lol

A lot of what you're seeing is the angle of the video.

dale does roll up to the start but if you look at RK at the moment of start, he turns his head and they both pin it with in a 1/10 of a second.   You can also see both of their roosts and Q's is again a 1/10 of a second slower.

Gotta to say RK put a lot of work in to Zelda with the 1000 intake and the dual carbs etc Dale is doing pretty good to beat that bike with a duner none the less.